Merge branch 'acpi-fixes'

* acpi-fixes:
  ACPI / AC: Add sleep quirk for Thinkpad e530
  ACPI / EC: Restart transaction even when the IBF flag set
  ACPI video: ignore BIOS initial backlight value for HP 1000
  ACPI: Fix section to __init. Align with usage in acpixf.h
  ACPI / PM: Move processor suspend/resume to syscore_ops

7 files changed, 74 insertions, 20 deletions

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 00d2efd674df..4f4e741d34b2 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -28,6 +28,8 @@
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/delay.h>
 #ifdef CONFIG_ACPI_PROCFS_POWER
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
@@ -74,6 +76,8 @@ static int acpi_ac_resume(struct device *dev);
 #endif
 static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
 
+static int ac_sleep_before_get_state_ms;
+
 static struct acpi_driver acpi_ac_driver = {
         .name = "ac",
         .class = ACPI_AC_CLASS,
@@ -252,6 +256,16 @@ static void acpi_ac_notify(struct acpi_device *device, u32 event)
         case ACPI_AC_NOTIFY_STATUS:
         case ACPI_NOTIFY_BUS_CHECK:
         case ACPI_NOTIFY_DEVICE_CHECK:
+                /*
+                 * A buggy BIOS may notify AC first and then sleep for
+                 * a specific time before doing actual operations in the
+                 * EC event handler (_Qxx). This will cause the AC state
+                 * reported by the ACPI event to be incorrect, so wait for a
+                 * specific time for the EC event handler to make progress.
+                 */
+                if (ac_sleep_before_get_state_ms > 0)
+                        msleep(ac_sleep_before_get_state_ms);
+
                 acpi_ac_get_state(ac);
                 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
@@ -264,6 +278,24 @@ static void acpi_ac_notify(struct acpi_device *device, u32 event)
         return;
 }
 
+static int thinkpad_e530_quirk(const struct dmi_system_id *d)
+{
+        ac_sleep_before_get_state_ms = 1000;
+        return 0;
+}
+
+static struct dmi_system_id ac_dmi_table[] = {
+        {
+        .callback = thinkpad_e530_quirk,
+        .ident = "thinkpad e530",
+        .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+                DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
+                },
+        },
+        {},
+};
+
 static int acpi_ac_add(struct acpi_device *device)
 {
         int result = 0;
@@ -312,6 +344,7 @@ static int acpi_ac_add(struct acpi_device *device)
                 kfree(ac);
         }
 
+        dmi_check_system(ac_dmi_table);
         return result;
 }
 
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index d45b2871d33b..edc00818c803 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -223,7 +223,7 @@ static int ec_check_sci_sync(struct acpi_ec *ec, u8 state)
 static int ec_poll(struct acpi_ec *ec)
 {
         unsigned long flags;
-        int repeat = 2; /* number of command restarts */
+        int repeat = 5; /* number of command restarts */
         while (repeat--) {
                 unsigned long delay = jiffies +
                         msecs_to_jiffies(ec_delay);
@@ -241,8 +241,6 @@ static int ec_poll(struct acpi_ec *ec)
                         }
                         advance_transaction(ec, acpi_ec_read_status(ec));
                 } while (time_before(jiffies, delay));
-                if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
-                        break;
                 pr_debug(PREFIX "controller reset, restart transaction\n");
                 spin_lock_irqsave(&ec->lock, flags);
                 start_transaction(ec);
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index bec717ffd25f..c266cdc11784 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -95,9 +95,6 @@ static const struct acpi_device_id processor_device_ids[] = {
 };
 MODULE_DEVICE_TABLE(acpi, processor_device_ids);
 
-static SIMPLE_DEV_PM_OPS(acpi_processor_pm,
-                         acpi_processor_suspend, acpi_processor_resume);
-
 static struct acpi_driver acpi_processor_driver = {
         .name = "processor",
         .class = ACPI_PROCESSOR_CLASS,
@@ -107,7 +104,6 @@ static struct acpi_driver acpi_processor_driver = {
                 .remove = acpi_processor_remove,
                 .notify = acpi_processor_notify,
                 },
-        .drv.pm = &acpi_processor_pm,
 };
 
 #define INSTALL_NOTIFY_HANDLER          1
@@ -934,6 +930,8 @@ static int __init acpi_processor_init(void)
         if (result < 0)
                 return result;
 
+        acpi_processor_syscore_init();
+
         acpi_processor_install_hotplug_notify();
 
         acpi_thermal_cpufreq_init();
@@ -956,6 +954,8 @@ static void __exit acpi_processor_exit(void)
 
         acpi_processor_uninstall_hotplug_notify();
 
+        acpi_processor_syscore_exit();
+
         acpi_bus_unregister_driver(&acpi_processor_driver);
 
         return;
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f0df2c9434d2..eb133c77aadb 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -34,6 +34,7 @@
 #include <linux/sched.h>       /* need_resched() */
 #include <linux/clockchips.h>
 #include <linux/cpuidle.h>
+#include <linux/syscore_ops.h>
 
 /*
  * Include the apic definitions for x86 to have the APIC timer related defines
@@ -210,33 +211,41 @@ static void lapic_timer_state_broadcast(struct acpi_processor *pr,
 
 #endif
 
+#ifdef CONFIG_PM_SLEEP
 static u32 saved_bm_rld;
 
-static void acpi_idle_bm_rld_save(void)
+int acpi_processor_suspend(void)
 {
         acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld);
+        return 0;
 }
-static void acpi_idle_bm_rld_restore(void)
+
+void acpi_processor_resume(void)
 {
         u32 resumed_bm_rld;
 
         acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld);
+        if (resumed_bm_rld == saved_bm_rld)
+                return;
 
-        if (resumed_bm_rld != saved_bm_rld)
-                acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld);
+        acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld);
 }
 
-int acpi_processor_suspend(struct device *dev)
+static struct syscore_ops acpi_processor_syscore_ops = {
+        .suspend = acpi_processor_suspend,
+        .resume = acpi_processor_resume,
+};
+
+void acpi_processor_syscore_init(void)
 {
-        acpi_idle_bm_rld_save();
-        return 0;
+        register_syscore_ops(&acpi_processor_syscore_ops);
 }
 
-int acpi_processor_resume(struct device *dev)
+void acpi_processor_syscore_exit(void)
 {
-        acpi_idle_bm_rld_restore();
-        return 0;
+        unregister_syscore_ops(&acpi_processor_syscore_ops);
 }
+#endif /* CONFIG_PM_SLEEP */
 
 #if defined(CONFIG_X86)
 static void tsc_check_state(int state)
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index c3932d0876e0..5b32e15a65ce 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -456,6 +456,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
                 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"),
                 },
         },
+        {
+         .callback = video_ignore_initial_backlight,
+         .ident = "HP 1000 Notebook PC",
+         .matches = {
+                DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+                DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"),
+                },
+        },
         {}
 };
 
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 5b3d2bd4813a..64b8c7639520 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -77,7 +77,7 @@ struct acpi_signal_fatal_info {
 /*
  * OSL Initialization and shutdown primitives
  */
-acpi_status __initdata acpi_os_initialize(void);
+acpi_status __init acpi_os_initialize(void);
 
 acpi_status acpi_os_terminate(void);
 
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index b327b5a9296d..ea69367fdd3b 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -329,10 +329,16 @@ int acpi_processor_power_init(struct acpi_processor *pr);
 int acpi_processor_power_exit(struct acpi_processor *pr);
 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 int acpi_processor_hotplug(struct acpi_processor *pr);
-int acpi_processor_suspend(struct device *dev);
-int acpi_processor_resume(struct device *dev);
 extern struct cpuidle_driver acpi_idle_driver;
 
+#ifdef CONFIG_PM_SLEEP
+void acpi_processor_syscore_init(void);
+void acpi_processor_syscore_exit(void);
+#else
+static inline void acpi_processor_syscore_init(void) {}
+static inline void acpi_processor_syscore_exit(void) {}
+#endif
+
 /* in processor_thermal.c */
 int acpi_processor_get_limit_info(struct acpi_processor *pr);
 extern const struct thermal_cooling_device_ops processor_cooling_ops;